#loading{
    height: 100%;
    display: flex;
    background: rgba(25, 70, 100,0.6);
}
#loading .container{
    margin: auto;
}
#loading span{
    display: inline-block;
    margin: 0 0.5rem;
    width: 0.8rem;
    height: 100%;
    border-radius: 4px;
    background: lightgreen;
    animation: load 1s ease infinite;
}
@keyframes load{
    0%,100%{
        height: 40px;
        background: lightgreen;
    }
    50%{
        height: 70px;
        margin: -15px 0;
        background: lightblue;
    }
}
#loading span:nth-child(2){
    animation-delay:0.2s;
}
#loading span:nth-child(3){
    animation-delay:0.4s;
}
#loading span:nth-child(4){
    animation-delay:0.6s;
}
#loading span:nth-child(5){
    animation-delay:0.8s;
}